Which finding on fetal monitoring would be considered nonreassuring and place tracing in Category III?

• A. Absent baseline fetal heart rate variability
• B. Accelerations with normal variability
• C. Early decelerations
• D. Tachycardia

Answer: (A)

The key idea is how fetal heart rate variability reflects the fetus’s ability to respond to stress and how Category III patterns signal a nonreassuring situation. Baseline variability represents beat-to-beat changes driven by the fetal autonomic nervous system. When variability is absent, it suggests compromised oxygenation or central nervous system depression and is the most ominous finding on a tracing. In labor, this alone or with other signs (like bradycardia or decelerations) pushes the tracing into Category III, which is considered nonreassuring and requires immediate assessment and intervention.

Accelerations with normal variability indicate good oxygenation and reassuring status; early decelerations are typically benign and related to head compression; tachycardia can occur for various reasons and is not by itself a definitive Category III pattern. So the absence of baseline variability best fits the nonreassuring Category III designation.